added nginx with supervisor

so much suffering occurred here.  Let's hope it was worth it.

flask.conf

@@ -0,0 +1,9 @@
+server {
+    listen      8080;
+
+    location / {
+        proxy_pass http://localhost:5000/;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    }
+}